Buggy code:
public class FlexiantComputeClient { private final FlexiantBaseClient flexiantBaseClient ; public FlexiantComputeClient ( final String endpoint , final String apiUserName , final String password ) { } protected UserService getService ( ) { } protected String getCustomerUUID ( ) { } public Set < Server > getServers ( final String prefix , @ Nullable String locationUUID ) throws FlexiantException { } public Set < Server > getServers ( @ Nullable final String locationUUID ) throws FlexiantException { } public Set < Image > getImages ( @ Nullable final String locationUUID ) throws FlexiantException { } public Set < Location > getLocations ( ) throws FlexiantException { } public Set < Hardware > getHardwareFlavors ( @ Nullable final String locationUUID ) throws FlexiantException { } public Set < Network > getNetworks ( @ Nullable final String locationUUID ) throws FlexiantException { } @ Nullable public Server getServerByIp ( String ip , @ Nullable String locationUUID ) throws FlexiantException { } @ Nullable public Server getServerByIp ( String ip , String filter , @ Nullable String locationUUID ) throws FlexiantException { } @ Nullable protected Server searchByIp ( Set < Server > servers , String ip ) { } public Server createServer ( final ServerTemplate serverTemplate ) throws FlexiantException { } public void startServer ( String serverUUID ) throws FlexiantException { } public void startServer ( Server server ) throws FlexiantException { } public void stopServer ( String serverUUID ) throws FlexiantException { } public void stopServer ( Server server ) throws FlexiantException { } public void deleteServer ( final Server server ) throws FlexiantException { } public void deleteServer ( final String serverUUID ) throws FlexiantException { } protected void deleteResource ( final String uuid ) throws FlexiantException { } protected void changeServerStatus ( String serverUUID , ServerStatus status ) throws FlexiantException { } @ Nullable public Server getServer ( final String serverUUID ) throws FlexiantException { } @ Nullable public Image getImage ( final String imageUUID ) throws FlexiantException { } @ Nullable public Hardware getHardware ( final String hardwareUUID ) throws FlexiantException { } @ Nullable public Location getLocation ( final String locationUUID ) throws FlexiantException { } @ Nullable protected Cluster getCluster ( final String clusterUUID ) throws FlexiantException { } @ Nullable protected Vdc getVdc ( final String vdcUUID ) throws FlexiantException { } @ Nullable protected < T > T getResource ( final String resourceUUID , final ResourceType resourceType , final Class < T > type ) throws FlexiantException { } @ Nullable protected < T > T getSingleResource ( final SearchFilter sf , final ResourceType resourceType , final Class < T > type ) throws FlexiantException { } protected < T > List < T > getResources ( final String prefix , final String attribute , final ResourceType resourceType , final Class < T > type , @ Nullable final String locationUUID ) throws FlexiantException { } protected < T > List < T > getResources ( final ResourceType resourceType , final Class < T > type , @ Nullable final String locationUUID ) throws FlexiantException { SearchFilter sf = new SearchFilter ( ) ; if ( locationUUID != null ) { FilterCondition fcLocation = new FilterCondition ( ) ; fcLocation . setCondition ( IS_EQUAL_TO ) ; fcLocation . setField ( "vdcUUID" ) ; fcLocation . getValue ( ) . add ( locationUUID ) ; sf . getFilterConditions ( ) . add ( fcLocation ) ; } try { <START_BUG> return ( ( List < T > ) ( this . getService ( ) . listResources ( null , null , resourceType ) . getList ( ) ) ) ; <END_BUG> } catch ( ExtilityException e ) { throw new FlexiantException ( String . format ( "Error<seq2seq4repair_space>while<seq2seq4repair_space>retrieving<seq2seq4repair_space>resources<seq2seq4repair_space>of<seq2seq4repair_space>resourceType<seq2seq4repair_space>%s." , resourceType ) , e ) ; } } }

Fix:
return ( ( List < T > ) ( this . getService ( ) . listResources ( sf , null , resourceType ) . getList ( ) ) ) ;